Is “Daybook” a Scrabble word?
Yes
DAYBOOK
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Daybook
/ˈdeɪˌbʊk/
noun
1.A daily chronicle; a diary.
2.(bookkeeping) A ledger; an accounting journal.
3.A logbook.
Synonyms: diary, journal